feat: include user and gentime for NVUE reboot reason in health

[jayzhudev]

Is this a new feature, an enhancement, or a change to existing functionality?

Enhancement

How would you describe the priority of this feature request

Medium

Please provide a clear description of problem this feature solves

NVUE reboot data includes reason, gentime, and user. Operators can use these fields in structured logs, including OTLP, for reboot investigation.

Keep gentime and user out of metrics to avoid high-cardinality labels and operator-data exposure. Metrics retain low-cardinality data; log sinks retain full reboot context.

Feature Description

• WHEN NVUE returns reboot data, carbide-health SHALL log message_id, switch_id, reason, gentime, and user to all configured log sinks.
• WHEN exporting to OTLP, carbide-health SHALL preserve these log attributes.
• WHILE diagnostics are disabled, carbide-health SHALL retain standard log attributes.
• WHEN emitting reboot_reason_info, carbide-health SHALL include only reason as a reboot-data metric label.
• IF a reboot field is missing, carbide-health SHALL use unknown.

Describe your ideal solution

No response

Describe any alternatives you have considered

No response

Additional context

No response

Code of Conduct

• I agree to follow NVIDIA Infra Controller's Code of Conduct
• I have searched the open feature requests and have found no duplicates for this feature request

[ajf]

Reopening for QA; In NICo, only the QA team should be closing GitHub Issues. This ensures that work we're doing actually gets tested, and that test plans, regression testing, etc all gets setup properly. From the developer side, change the "Project Status" and change state to "Verify" (this makes QA see it), with Disposition of "item completed"